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Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding
Fang-Yu Fan1, Hsin-Hua Chou2, Wei-Chun Lin1
1School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan.
Polymers
|December 10, 2021
Summary
This study optimized light guide plates (LGPs) using microstructural patterns for improved illuminance uniformity. The optimal design, manufactured via micro-injection molding, achieved significantly higher average illuminance and uniformity.
Area of Science:
- Optics and Photonics
- Materials Science
- Manufacturing Engineering
Background:
- Uniform illuminance distribution is critical for display technologies utilizing light guide plates (LGPs).
- Traditional LGP designs often struggle to achieve consistent brightness and uniformity across the entire surface.
- Microstructural patterns offer a potential solution for enhancing LGP performance.
Purpose of the Study:
- To investigate the impact of microstructural patterns on the illuminance field uniformity of light guide plates (LGPs).
- To optimize the design and fabrication process for LGPs with enhanced illuminance distribution.
- To evaluate the influence of micro-injection molding (μIM) process parameters on LGP uniformity.
Main Methods:
- Design of microstructural patterns on LGP surfaces.
- Fabrication of LGP molds using photolithography.
- Manufacturing of molded LGPs using micro-injection molding (μIM).
- Optical field measurements to assess illuminance values and uniformity.
Main Results:
- The LGP with optimal microstructural design achieved an average illuminance of 196.1 cd/m², 1.3 times higher than LGPs without microstructures.
- The uniformity of the optimally designed LGP with microstructures reached 86.4%, approximately 1.65 times greater than LGPs without microstructures.
- Mold temperature was identified as the most critical μIM process parameter influencing illuminance field distribution.
Conclusions:
- Optimized microstructural designs significantly enhance the illuminance uniformity of LGPs.
- Micro-injection molding is a viable technology for manufacturing large-sized, high-uniformity LGPs with microstructures.
- Further research into μIM process parameters can lead to even better LGP performance for display applications.
